rex sole

Open encyclopedia reference

The rex sole (Glyptocephalus zachirus) is a flatfish of the family Pleuronectidae. Locally, it may also be known as a witch or threadfin sole (due to the filamentous pelvic fin on the eyed surface). It is a demersal fish that lives in temperate waters on sand or mud bottoms at depths of up to 900 metres (3,000 ft), though it is most commonly found between 61 and 500 metres (200 and 1,640 ft). Its native habitat is the northern Pacific, from Baja California in Mexico up the coasts of the United States, British Columbia and Alaska, across the Bering Sea to the coast of Russia and the Sea of Japan. It is slow-growing, reaching up to 60 centimetres (24 in) in length (though its average length is 36 centimetres (14 in)), and it can weigh up to 2.0 kilograms (4.4 lb). Maximum reported lifespan is 24 years.

Wikipedia contributors, Rex sole; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T02:44:06.172031+00:00. This reference remains separate from the taxonomic record.

Identity & source status

Scientific name

Glyptocephalus zachirus Lockington, 1879

Name authority

Lockington, 1879

Common name

rex sole

Rank

species

Accepted status

accepted

Kingdom

Animalia

Phylum

Chordata

Class

Teleostei

Order

Pleuronectiformes

Family

Pleuronectidae

Genus

Glyptocephalus

Extinction status

Not supplied by this source

Source habitat flags: Marine: yes · Freshwater: no · Terrestrial: no. These do not form a complete habitat description.

Classification family tree

Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.

1. domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
2. kingdomAnimalia
3. phylumChordata
4. subphylumVertebrata
5. infraphylumGnathostomata
6. parvphylumOsteichthyes
7. gigaclassActinopterygii
8. superclassActinopteri
9. classTeleostei
10. orderPleuronectiformes
11. suborderPleuronectoidei
12. familyPleuronectidae Rafinesque, 1815
13. subfamilyPleuronectinae Rafinesque, 1815
14. genusGlyptocephalus Gottsche, 1835
15. speciesGlyptocephalus zachirus Lockington, 1879

Close classified relatives

These entries share the source’s genus, Glyptocephalus. They are not necessarily the closest relatives established by molecular evidence.

Browse 86 records assigned to Pleuronectidae.

Names & synonyms

Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.

Source literature & publication evidence

References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.

1. Lockington, W. N. (1879). Review of the Pleuronectidae of San Francisco. Proceedings of the United States National Museum, v. 2 (no. 72): 69–108. https://doi.org/10.5479/si.00963801.72.69 Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references

Origins, evidence & remaining research

Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.

Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record.

Dataset citation & attribution

This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11

Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.

Stable key: col:3GHMT. Classification follows source parent identifiers. English common names may vary by region.